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What is the difference between Apache Hadoop and RDBMS?
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What is the problem with HDFS and streaming data like logs
Data Engineer Given a list of followers in the format:123, 345234, 678345, 123…Where column one is the ID of the follower and column two is the ID of the followee. Find all mutual following pairs (the pair 123, 345 in the example above). How would you use Map/Reduce to solve the problem when the list does not fit in memory?
What does the command mapred.job.tracker do?
how would you modify that solution to only count the number of unique words in all the documents?
Does this lead to security issues?
What infrastructure do we need to process 100 TB data using Hadoop?
Why do we use Hadoop?
What are the different types of Znodes?
what are Task Tracker and Job Tracker?
What is difference between secondary namenode, checkpoint namenode & backupnod secondary namenode, a poorly named component of hadoop?
Where is the Mapper Output stored?
What is HDFS Federation?
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